Dynamo-electric machine



\ Jan. l 1924 R. MYERS DYNAMO ELECTRIC MACHINE Filed 5 Sheets-Sheet l Jan. l, 1924 1,479,152

R. MYERS DYNAMO ELECTRI C MACHINE Filed March 8. 1921 3 Sheets-Sheet 2 6 n/eor 730272625226 Wye/z5.

Patented Jan. 1, 1924.

UNITED STATES PATENT OFFICE.

ROMAINE MYERS, 0F OAKLAND, CALIFORNIA, ASSIGNOR TO CALIFORNIA CAP COM- PANY, OIFy OAKLAND, CALIFORNIA, A CORPORATION OF CALIFORNIA.

DYNAMO-ELECTRIC MACHINE.

Application mea March s, 1921.

To all whom t may concern:

Be it known that I, ROMAINE MYERS, a citizen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented certain new and useful Improvements in Dynamo- Elect-ric Machines, of which the following is a specification.

The present invention relates broadly to a dynamo electric machine, and more particularly to an electric exploder capable of beingrtransported from place to place, and of generating suilicient power when actuated for igniting or exploding a number of blasting caps or other blasting devices.

One of the principal objects of the invention is to provide a portable apparatus for generating current constructed in such manner that the current delivered thereby rapidly attains its peak load when delivered to the exploding circuit, and gradually diminishes, instead of gradually increasingv and gradually diminishing as is the case Vwith machines for this purpose now on the market.

A further object is to provide an apparatus employing a'spring motor and planetary transmission and overrunning clutch between the spring motor and armature.

A further object is to provide a means for preventing the release of the spring until the same is completely wound.

Another object is to provide a means for limiting the winding and unwinding of the spring. c

A further object is to provide protectors for the wire terminals and for the winding vand pawl shafts.

With the above mentioned and other objects in view, the invention consists in the companying drawings, and set forth in the claims hereto appended, it being understood that various changes in the form, proportion, size and minor details of construction within the scope of the claims may be resorted to without departing from the spirit or sacrificing anyfof the advantages of the invention.

In the drawin s:-

Figure 1 is a ongitudinal sectional view of the preferred embodiment of my invention.

Serial No. 450,599.

Figure 2 is a, sectional view taken on line 2 viewed in the direction of the arrow.

Figure 3 is a vertical sectional view taken on line 3 viewed in the direction of the arrow.

'Figure 4 is a view in detail elevation of the key shafts for the spring motor and pawl.

Figure 5 is a view in elevation of the ratchet associated with the hub of the spring motor and illustrating the peripheral teeth.

Figure 6 is a broken detail of the plane` tary transmission pinion and overrunning clutch.

Figure 7 is a sectional 7-7 of Figure 6.

Figure 8 is a sectional view taken on line 8 8 of Figure 1.

Figure 9 is a view in elevation of the commutator and brushes.

Figure l0 is a sectional view taken on line 10e-10 of Figure 9 illustrating the terminals for the exterior circuit.

Figure 1l is a detail View in elevation 01"' the contact associated with the generator field.

`Figure l2 is a. sectional view taken on line 12-12 of Figure 11, and

Figure 13 is a wiring diagram of the apparatus.

In the drawings, wherein like characters of reference designate corresponding parts, l indicates a metallic shell or casing open at view taken on line Ione end and closed at its opposite end by the wall 2, said casing being provided prefer-` ably with a carrying or transporting handle 3 and supporting legs 4. Removably positioned within sald casing, through its open end, is an inner casing or support 5, cylin.- drical in form and divided near one end by a transverse wall 6 formed in its center with a bearing openin 7. The portion of said member 5 beyon the wall 6 is interiorly toothed forming an annular gear 8. The opposite end of the member 5 is flanged as at 9, and extendin therefrom are guide members 10 preferab y four in number, and particularly illustrated in Figure 8. The surfaces of these members carrying out the general contour of the periphery of the solid portion. of the member 5. An end closure plate 11 is received within and closes the open end of the casing l and abuts against the ends of the members 10, the same y posite end of which is secured as at V30 to a stop i'inger or arm 3l, extending i'rom the the opposite end ot Which is received in a stub shaft 13 rotatably mounted in the bearing 7. Vihe tubular shaft 16 is provided at one end With a recess 19 surrounding the shaft i7, and in which recess is received the enlarged end ot the stub shaft 13, Which enlarged end ot' said shaft is provided on its periphery' with the roller clutch receivingl depressions 20, in each or" which is received a roller clutch 2l,

The stub shaft i3 at a point adjacent the Wall 6 is formed with gear teeth providing a pinion 22, and said shaft beyond said pinion is cylindrical in term, and is reduced as at 23, its end passing through a bearing 2d an opening 25 in the end Wall 2 ot the cas-- ing i. rlhe end of said shai't 23 is preterably triangular in plan, as at 26, igure 5 of the drawings, providing a key end which. is surrounded by an outstandino` Vflange 27 on the Wall of the end 2, providing a lr y soclret su 1rounding the portion 2,6, 'and at the same time protecting` the end 26 of said shaft 23.

The power mechanism tor said armature is preferably constructed in the i'olloiving manner ldounted to rotate on 'the ineinber 23 is a hub 28 provided at opposite sides with iianges, and to the center of said hub is'secured one end et a spring 29, the opend of the member 9 beyond the gear 8, said portion 31 providing a spring anchor andA stop. The itlange 32 adjacent the annular gear 3 carries at diametrically opposite points arms 33, laterally trom which project During the unvvinding ot the motor, itV

will be observed that the member 23 is rotated in the direction of the arrow, Figure il, and the same through the pinion 22, operates gears 35 to move over the surface of the Vgear 3, imparting a reverse Aor Winding movement to the hub 23, and during this operation the clutch rollers 2l remain in the deepest portion of theirV recesses 20, due to the reverse movement of said shait 23.

rhe flange 37 on the opposite end of the hub 23 is peripherally toothed orming a ratchet disc, and as in Figure 5 of the drawings, each tooth o' said ratchet disc With the exception or one, is provided With an overhanging lip 38 providingin said teeth so formed paivl receiving pockets 39. PivotA ally mounted on a key shaft el() rotatable Within an opening in the end Wall 2 above the opening 25 is a retaining pawl 4:1 disposed to be received during the winding rotation of the ratchet disc Within the ratchet teeth thereof, and said paWl projects from a hub 4t2 with Which is secured one end of the spring coiled about the shaft el() and anchored in the end wall 2, said spring normally forcing the said pawl into engagement with the ratchet teeth. The shaft 40 at its outer end is triangular in plan, or of lrey formation, and is received Within a pocket in the end Wall, which pocketlprovides a lrey seat and a protector for the end or the shaft. The lipless tooth of the ratchet disc is so disposed on the same as to coact With the retaining pavvl il at such time Aas the spring 29 is fully Wound, and to co-opcrate with said paWl only once'during the full winding of said spring'. Thus it Will be apparent that as the lips 38 prevent the removal oi the paWl il from the other ratchets during the winding oi the spring,

able conductors connected With the generator iield.

From the opposite end of the field extend `posts i3 associated With the lcooperating spring contacts 49, a suitable switch or other contact device Vpreferably `carried by the dividing Wall 6. rThe tendency of said fingers 49 is to contact, and to separate the saine a Wedge or separator 50 having a beveled end is positioned to reciprocate between the incliner portions 51 of said lingers, and the same is provided with an operating guide stem 52V received in an opening 53 in the dividing Wall 6. One of the .trunnions 34 is provided with a rounded head 5a received in an annular groove 55 in the outer tace of the Wall 6,'and the same is adapted to engage with the rounded end 53 of the stem 52 at such time as the finger 36 contacts lwith the stop 3001i the full unwinding of the Spring 29, as in lligure l ofV the drawings, forcing said member OroutWardly to separate the ngers 5l, as in Figures l1 and 12 of the drawings. From osts 56 associated with fingers 50 extend eads 57 connected with terminals 58 carried by the plate 11 and extending through openings in a finishing plate 59 positioned over the open end of the casing 1, and held to the plate 11 b screws 60. The terminals 58 are protecte by an outwardly projecting flan e 61 providing a pocket 62 surrounding t e said terminals.

It will be apparent that the present generator is so constructed as to discharge throu h the terminals to the external circuit, t e generated power only on the armature attaining its maximum s eed of rotation; this being accomplished y the actuation of the contact fingers 50 immediately on the spring 29 becoming completely unwound, and on the actuatin of the armature and the complete unwining of the spring 29, the overrunning clutch ermits of free rotation of the armature re ative to said power mechanism.

It will also be observed that a simple planetary transmission developing the maximum power output from a sprlng is employed between the spring and armature, and also that the spring winding mechanism 'and release feature is constructed in such manner that with a single key for winding and releasing, it is impossible to release or operate the apparatus until such time as the spring is fully wound, thus precluding the failure of the armature to rotate at the required speed to generate the necessary power.

Having thus described my invention what I claim as new and desire to secure by Let ters Patent of the United States is l. An apparatus for the described purpose including a tubular casing open at one end and closed at its opposite end, a shell insertable as a unit thereinto through its o en end and mounting a motor actuated e ectrical generating mechanism, means (projecting beyond one end of the shell an through the closed end of the casing for controllin the winding and operation of the motor o the generating mechanism, a closure plate for the opposite end of the casing for retaining the shell within the casin and terminals carried exteriorly of the pate and connecting with the generating mechanism carried by the shell.

2. A dynamo electric machine including a casing, a generator therein adjacent one end, means within the casing at its opposite end for operating the generator, an external circuit extending from the generator field and exteriorly of the casing through the generator end, a contact device across the generator field, and means actuated by the generator operating means for opening said contact device and maintaining the same open on and after the generator attains its maximum speed.

In testimony whereof I have signed my name to this specification.

' ROMAINE MYERS. 

